Cashier Depot No. 9 Business Envelopes with Left Window, (3 7/8 x 8 7/8), Security Tinted, Gum Flap, 24lb White, 500 per Box. Item#GF9LWT Standard No. 9 (3 7/8 x 8 7/8) with Left Window 500 Envelopes per Box Standard (1-1/8" x 4-1/2" Window) positioned 7/8" from left and 1/2" from bottom Gummed Flap 24lb White Paper